Blog

A buffer solution is made by mixing 0.10 mol acetic acid and 0.10 mol sodium acetate in 1.0 L solution. If Ka = 1.8×10⁻5, what is the pH of the buffer?

If 10.0 g of aluminum reacts with excess hydrochloric acid, how many liters of hydrogen gas are produced at STP? (Reaction: 2Al + 6HCl → 2AlCl₃ + 3H₂)

Calculate the Output Voltage for the Given Circuit: Assume Input Voltage one is 6 V and Input Voltage two is 4 V.

Ideal gas law is:

Calculate the Output Voltage for the Given Circuit: Assume Input Voltage one is 6 V and Input Voltage two is 2 V.

Calculate the Output Voltage for the Given Circuit: Consider the input voltage as 6V.

A balanced chemical equation shows:

If the density of a solution is 1.2 g/mL and its molarity is 2.0 M NaCl, what is the mass percent of NaCl in the solution? (Molar mass NaCl = 58.5 g/mol)

What is the energy of a photon with a wavelength of 500 nm? (Use E = hc/λ, h = 6.63×10⁻³⁴ J·s, c = 3.0×10⁸ m/s)

If 2.0 g of magnesium reacts with excess oxygen, how many grams of magnesium oxide are formed? (Reaction: 2Mg + O₂ → 2MgO, molar mass Mg = 24 g/mol, MgO = 40 g/mol)